November 29, 1999
PRINTER
2-9
Detailed
Descriptions
2.2.2 LASER EXPOSURE
Overview
This machine uses a laser diode to produce electrostatic images on an OPC drum.
The laser diode unit converts image data from the FCU into laser pulses, and the
optical components direct these pulses to the drum.
Exposure of the drum by the laser beam creates the latent image. The laser beam
makes the main scan while drum rotation controls the sub scan.
Strength of the beam output
5 mW
Strength of the beam on the drum
0.612 mW
Beam size
72 X 90
µ
m
The speed of polygonal mirror motor depends on the printing mode.
Printing Mode
Speed of mirror motor
(Hz)
Occasion
400dpi printing
1503.9
Copying, printing reports, receiving
15.4 dpmm normal printing
1470.5
Receiving
15.4 dpmm image rotation
printing
1527.8
Receiving in image rotation mode
600 dpi printing
2255.9
Printing in printer mode